cmake: Offset library linking flags

Fixes: zephyrproject-rtos#8440

This commit moves the link flag  -u_OffsetAbsSyms which is required
when linking to offset static library.

The library offset thus propagates the flags correctly during linking.
It also ensures knowledge about link flags is present where it
correctly belongs.

Signed-off-by: Torsten Rasmussen <torsten.rasmussen@nordicsemi.no>

CMakeLists.txt

@@ -635,14 +635,23 @@ set(OFFSETS_O_PATH ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/offsets.dir/arch/${ARC
 set(OFFSETS_H_PATH ${PROJECT_BINARY_DIR}/include/generated/offsets.h)
 
 add_library(          offsets STATIC ${OFFSETS_C_PATH})
-target_link_libraries(offsets zephyr_interface)
+target_link_libraries(offsets INTERFACE -u_OffsetAbsSyms)
 add_dependencies(     offsets
   syscall_list_h_target
   syscall_macros_h_target
   driver_validation_h_target
   kobj_types_h_target
   )
 
+# Kernel is a Zephyr interface dependency, which means everyone using zephyr_interface has an
+# indirect dependency, which for other libraries is fine.
+# However offsets does not need to link to kernel as there is no dependency.
+# Instead kernel depends on generated offset.h so to avoid a non-existing circular dependency,
+# offset lib only requires the compile options and include directories from zephyr_interface.
+target_compile_options(    offsets PRIVATE $<TARGET_PROPERTY:zephyr_interface,INTERFACE_COMPILE_OPTIONS>)
+target_compile_definitions(offsets PRIVATE $<TARGET_PROPERTY:zephyr_interface,INTERFACE_COMPILE_DEFINITIONS>)
+target_include_directories(offsets PRIVATE $<TARGET_PROPERTY:zephyr_interface,INTERFACE_INCLUDE_DIRECTORIES>)
+
 add_custom_command(
   OUTPUT ${OFFSETS_H_PATH}
   COMMAND ${PYTHON_EXECUTABLE} ${ZEPHYR_BASE}/scripts/gen_offset_header.py
@@ -812,11 +821,9 @@ set_property(TARGET
 
 set(zephyr_lnk
   ${LINKERFLAGPREFIX},-Map=${PROJECT_BINARY_DIR}/${KERNEL_MAP_NAME}
-  -u_OffsetAbsSyms
   ${LINKERFLAGPREFIX},--whole-archive
   ${ZEPHYR_LIBS_PROPERTY}
   ${LINKERFLAGPREFIX},--no-whole-archive
-  ${OFFSETS_O_PATH}
   ${LIB_INCLUDE_DIR}
   -L${PROJECT_BINARY_DIR}
   )